Clevis attachment for plows.



0. W. OLAPP. GLEVIS ATTACHMENT FOR FLOWS. APPLIGATION FILED NOV. 4, 1913.

1|" II lllllllllllll a I 5i M1 2/6 I; 17/2 10 I I! L 3 l3 I 2/ I 6 WITNESSES 7 /6 17 1 INIVENTOR WM CHARLES W. CLAPP, OF SOUTH BEND, INDIANA, ASSIGNOR TO OLIVER CHILLED PLOVI' WORKS, OF SOUTH BEND, INDIANA.

CLEVIS ATTACHMENT FOR PLOVJ'S.

Specification of Letters Patent.

Patented May 5, 1914:.

Application filed November 4, 1913. Serial No. 799,158.

To all whom it may concern:

Be it known that I, CHARLES IV. CLAPP, of South Bend, in the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Glevis Attachments for Flows; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

I This invention relates to improvements in clevis attachments and more particularly to such as are adaptable for use with plows,- one object of the invention being to provide a clevis structure capable of a wide or extended range of adjustment at right angles to the direction of travel and while there is strain on the draft devices.

A further object is to so construct a clevis attachment that the same may be easily and quickly adjusted while the plow is in mo tion.

A further object is to construct the clevis attachment in such manner that desired horizontal adjustments may be effected without the necessity of detaching the draft animals and without separating the parts of said clevis attachment.

I'Vith these and other objects in view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.

In the accompanying drawings; Figure 1 is a plan view showing the application of my improvements; Fig. 2 is a perspective view of the clevis devices; Fig. 3 is an enlarged sectional View of the same, partly in elevation, and Fig. 4 is an enlarged detail view of the adjustable draft link.

1 represents a gan plow structure which may comprise a plura ity of plow beams 2, 3, 4 suitably spaced apart by means of brackets 5. The forward ends of the beams 23 are connected by an interposed cross bar 6, and to said forward ends of the beams 23, vertically disposed, side clevis plates 77 are rigidly secured and each made with a vertical series of openings 8. A horizontal rod 9 is disposed between the side clevis plates and is adjustably secured thereto at any of the series of openings 8.

A horizontally disposed clevis 10 is mounted to slide on the rod 9. This clevis is made in the form of an open frame comprising top and bottom members 1l12 spaced apart and connected along the rear edge,-in proximity to which latter, openings are provided whereby the clevis frame is mounted and guided on the rod 9. The front edges of the members of the clevis frame 10 are separated from each other and each of said edges is made with a flange 13 slightly curved at its respective ends, as at 13*, for a purpose hereinafter explained. The respective members 1112 of the clevis frame are made with pairs of alining holes 14: for the accommodation of a pivot pin 15, whereby a draft link 16 may be attached to the clevis frame at any one of several positions thereon. The draft link 16 is provided at one end with a perforated boss 17 which enters between the clevis frame members to receive the pivot pin and the portions of said boss which project above and below the body of the link are adapted to bear against the flanges 13 of the clevis frame members. The link 16 is provided near its free forward end with a hole 18 for the reception of a pin 18*, by means of which, a hitching device or clevis 19 is attached to said link. By means of the construction above described, adjustment of the draft link from one position to another on the clevis frame 10, may be readily effected without removing the link from the clevis or even stopping the progress of the plow. It is evident that when the pin 15 is removed, engagement of the boss 17 of link 16 with the flanges 11-12 of the clevis frame will prevent disengagement of said link from the latter, and that said link may be readily slid from one position to another on the clevis frame and secured at any desired adjustment by insertion of the pin 15.

The clevis link 16 is provided with a toe 16 which, when the link is moved to one end or the other of the clevis frame so that its boss will engage the curved portions 13 of the flanges 13, said toe will engage the adjacent web portion 13 of the frame and thus prevent escape of the link from the clevis frame,it being necessary, to permit removal of the link, to turn the latter until the toe 16 shall be out of line with the adjacent web portion of the clevis frame.

The clevis frame 10 is formed with a rearwardly projecting yoke 20. This yoke is vertically disposed and approximately U- shaped to receive the elongated portion 21 of a bell-crank lever 22. The elongated por- 

